What does « Misr / Egypt » mean in the Quran?

And [recall] when you said, "O Moses, we can never endure one [kind of] food. So call upon your Lord to bring forth for us from the earth its green herbs and its cucumbers and its garlic and its lentils and its onions." [Moses] said, "Would you exchange what is better for what is less? Go into [any] settlement and indeed, you will have what you have asked." And they were covered with humiliation and poverty and returned with anger from Allah [upon them]. That was because they [repeatedly] disbelieved in the signs of Allah and killed the prophets without right. That was because they disobeyed and were [habitually] transgressing.

And We inspired to Moses and his brother, "Settle your people in Egypt in houses and make your houses [facing the] qiblah and establish prayer and give good tidings to the believers."

And the one from Egypt who bought him said to his wife, "Make his residence comfortable. Perhaps he will benefit us, or we will adopt him as a son." And thus, We established Joseph in the land that We might teach him the interpretation of events. And Allah is predominant over His affair, but most of the people do not know.

And when they entered upon Joseph, he took his parents to himself and said, "Enter Egypt, Allah willing, safe [and secure]."

And Pharaoh called out among his people; he said, "O my people, does not the kingdom of Egypt belong to me, and these rivers flowing beneath me; then do you not see?